Imam Malik, may Allah have mercy on him, said that in the case of intentional murder, it is necessary to take oaths from at least two claimants; after taking fifty oaths from them, the ruling of retaliation (qisas) will be given.
Hadith Referenceموطا امام مالك رواية يحييٰ / كتاب القسامة / 1540Q4